Act of War: High Treason

16:10 resolutions are supported natively. In the video options screen, select your resolution. 16:9 resolutions are not available.

Resolution data appears to be stored in this file:
DataCfg_14_12_2005.dct

But it's not very readable to human eyes. Furthermore, *this* file appears to exist to make sure you haven't been monkeying around with that file
DataCfg_14_12_2005.dct.md5sums

So I have no idea how you would make non-native resolutions work.